c# - 如何将 WPF NotifyIcon 与 Caliburn.Micro 集成

Question

我想知道如何集成NotifyIcon与 Caliburn.Micro。

我正在尝试使用低级 Caliburn API 与 Caliburn 集成。以下是类(class):

ITrayIconManager

public interface ITrayIconManager
{
    ITrayIcon GetOrCreateFor<T>();
}

ITrayIcon(包装来自WPF NotifyIcon的TaskbarIcon)

 public interface ITrayIcon : IDisposable
{
    void ShowBalloonTip(string title, string message, BalloonIcon symbol);
    void Show();
    void Hide();
}

ISetTrayIconInstance

public interface ISetTrayIconInstance
{
    ITrayIcon Icon { set; }
}

TrayIconWrapper

public class TrayIconWrapper : ITrayIcon
{
    private readonly TaskbarIcon icon;

    public TrayIconWrapper(TaskbarIcon icon)
    {
        this.icon = icon;
    }

    public bool IsDisposed { get; private set; }

    public void Dispose()
    {
        icon.Dispose();
        IsDisposed = true;
    }

    public void Show()
    {
        icon.Visibility = Visibility.Visible;
    }

    public void Hide()
    {
        icon.Visibility = Visibility.Collapsed;
    }

    public void ShowBalloonTip(string title, string message, BalloonIcon symbol)
    {
        icon.ShowBalloonTip(title, message, symbol);
    }
}

TrayIconManager

public class TrayIconManager : ITrayIconManager
{
    private readonly IDictionary<WeakReference, WeakReference> icons;

    public TrayIconManager()
    {
        icons = new Dictionary<WeakReference, WeakReference>();
    }

    public ITrayIcon GetOrCreateFor<T>()
    {
        if (!icons.Any(i => i.Key.IsAlive && typeof(T).IsAssignableFrom(i.Key.Target.GetType())))
            return Create<T>();

        var reference = icons.First(i => i.Key.IsAlive && typeof(T).IsAssignableFrom(i.Key.Target.GetType())).Value;
        if (!reference.IsAlive)
            return Create<T>();

        var wrapper = (TrayIconWrapper)reference.Target;
        if (wrapper.IsDisposed)
            return Create<T>();

        return wrapper;
    }

    private ITrayIcon Create<T>()
    {
        var rootModel = IoC.Get<T>();
        var view = ViewLocator.LocateForModel(rootModel, null, null);
        var icon = view is TaskbarIcon ? (TaskbarIcon)view : new TaskbarIcon();
        var wrapper = new TrayIconWrapper(icon);

        ViewModelBinder.Bind(rootModel, view, null);
        SetIconInstance(rootModel, wrapper);
        icons.Add(new WeakReference(rootModel), new WeakReference(wrapper));

        return wrapper;
    }

    private void SetIconInstance(object rootModel, ITrayIcon icon)
    {
        var instance = rootModel as ISetTrayIconInstance;
        if (instance != null)
            instance.Icon = icon;
    }
}

这是代码，现在我该如何使用它？这段代码依赖于Caliburn View - ViewModel绑定(bind)，也就是说，我需要为TasbarkIcon创建一个ViewModel和一个View(它必须继承自TaskbarIcon)强>控制):

TrayIconViewModel

public class TrayIconViewModel : IMainTrayIcon, ISetTrayIconInstance
{
    public TrayIconViewModel()
    {

    }

    public ITrayIcon Icon { get; set; }

    public void ShowWindow()
    {
        Icon.Hide();
        System.Windows.Application.Current.MainWindow.Show(); //very very bad :(
    }

ITrayIcon是TaskbarIcon控件的包装器。现在我可以从我的 ViewModel 调用它的方法，这很棒。

TrayIconView(cal:Message:Attach 不起作用 - ShowWindow 永远不会被击中)

<tb:TaskbarIcon x:Class="Communicator.Softphone.Views.TrayIconView"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
            xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
            xmlns:tb="http://www.hardcodet.net/taskbar"
            xmlns:cal="http://www.caliburnproject.org"
            mc:Ignorable="d" 
            d:DesignHeight="300" d:DesignWidth="300"
            IconSource="/Communicator.ControlLibrary;component/Assets/phone_icon.ico"
            ToolTipText="Secretária do Futuro - Comunicador"
            Visibility="Collapsed"
            cal:Message.Attach="[Event TrayLeftMouseDown] = [Action ShowWindow()]">

在我的 ShellViewModel 上(trayIcon 是 TaskbarIcon 的包装器):

private ITrayIcon trayIcon;
protected override void OnActivate()
    {
        trayIcon = trayIconManager.GetOrCreateFor<IMainTrayIcon>();
        ActivateItem(containers.FirstOfType<IPhone>());
    }
public override void CanClose(Action<bool> callback)
    {
        trayIcon.Show();
        trayIcon.ShowBalloonTip("Comunicador", "Comunicador foi minimizado", BalloonIcon.Info);
        (GetView() as Window).Hide();
        callback(false);
    }

trayIcon.Show()正在工作，但是trayIcon.ShowBallonTip(...)没有做任何事情，没有错误，什么也没有。

问题摘要:

1. Binding Message.Attach 不起作用，尽管 Caliburn 会在其工作时输出日志消息。
2. 在包装器上调用 ShowBallonTip 似乎不起作用，尽管它正在调用实际的 TaskbarIcon 方法。 (无需附加调试器即可工作)

Answer 1

您可以使用事件聚合器来执行您想要的操作。

文档:http://caliburnmicro.com/documentation/event-aggregator

向事件聚合器的 TaskbarViewModel 添加一个字段，并添加一个构造函数来容纳注入(inject):

public class TaskbarViewModel : PropertyChangedBase, ITaskbar {
    private readonly IEventAggregator _eventAggregator;

    public TaskbarViewModel(IEventAggregator eventAggregator) {
        _eventAggregator = eventAggregator;
    }

    public void Show() {
        IsVisible = true;
        _eventAggregator.PublishOnUIThread("Your balloontip message");
    }

    /// Rest of the implementation
}

实现 IHandle 接口(interface)，您可以在其中访问 TaskBarIcon 并调用 ShowBalloonTip 方法。